Fullstack Developer

Summary

Join Fundraise Up, a global fundraising platform, as a Senior Fullstack Developer and be a key contributor to our core product. You will design, build, and maintain frontend and backend features using React and Node.js, developing core products including donation checkouts and widgets. This role requires architecting scalable system components handling millions of transactions, writing clean, testable code, and mentoring peers. You will collaborate with product managers and designers, proactively identifying and resolving issues. This is an opportunity to solve real-world problems at scale within a mission-driven engineering culture.

Requirements

• 7+ years of professional fullstack development experience
• Deep understanding of modern JavaScript (event loop, closures, promises, prototypes)
• Expert-level proficiency with React and its ecosystem (familiarity with Vue is a plus)
• Strong backend expertise with Node.js (experience with Koa or NestJS is highly preferred)
• Experience with Webpack configuration, performance optimization, and profiling
• A keen eye for detail and a high sense of ownership and accountability for your work

Responsibilities

• Design, build, and maintain resilient frontend and backend features using React and Node.js
• Develop our core products, including donation checkouts, embeddable widgets, and donor/partner portals
• Architect and develop system components that scale across millions of monthly transactions
• Write clean, well-documented, and thoroughly testable code
• Drive architecture and technical design discussions to find elegant solutions to complex problems
• Mentor peers by conducting thoughtful code reviews and providing constructive feedback
• Partner with product managers and designers to clarify requirements and shape the roadmap
• Proactively identify and resolve bugs, performance bottlenecks, and optimization opportunities

Preferred Qualifications

• Experience with MongoDB, ClickHouse, or Elasticsearch
• Familiarity with Docker, CI/CD pipelines, or cloud infrastructure
• Contributions to open-source projects or a strong personal portfolio

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working